PIV

1. abbreviationinitialismmedicineInitialism of peripheral intravenous.

plural PIVs

1. abbreviationcountableuncountablemedicineAbbreviation of parainfluenza virus.
2. abbreviationcountableinitialismuncountableengineeringInitialism of particle image velocimetry.
3. abbreviationcountableinitialismuncountablebusinessInitialism of peak inverse voltage.
4. abbreviationcountableinitialismuncountableInitialism of post indicator valve.
5. abbreviationcountableinitialismuncountableInitialism of penis in vagina.

   To make things worse, it tormented him that he still considered himself a virgin—he'd received oral sex—but never given PIV sex a try.

   2010 December 17, Jess C Scott, Take-Out (Part 1), jessINK, →ISBN, →OL

   2 more examples

   Therefore, younger couples would be wise to stay open to other types of sexual scenarios, not limiting their sexual interaction to only PIV.

   2010 April 30, Libby Bennett with Ginger Holczer, Finding & Revealing Your Sexual Self: A Guide to Communicating About Sex, Rowman & Littlefield, →ISBN, →OL, pages 130–131

   Repudiating PIV (penis in vagina) and grappling with most forms of penetration, except orally under certain conditions, means for me the unmitigated physical rawness of fucking is not a part of my life.

   2014, Michelle Marie, "Fucking", Bluestockings, Spring 2014, page 36

6. abbreviationcountableinitialismuncountableInitialism of penile inversion vaginoplasty.